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Relay technology

The relay was invented more than 160 years ago. During the last 50 years it has undergone considerable change, the most obvious of which is its reduction in size. Using new and advanced contact materials, the switching capacity has either been maintained or increased and the use of new plastic materials has improved the insulation properties.

State-of-the-art technology and precision engineering has led to increased relay sensitivity, i.e. the ratio of input coil power to switching capacity.

Typical applications for relays include laboratory instruments, telecommunication systems, computer interfaces, domestic appliances, air conditioning and heating, automotive electrics, traffic control, lighting control, building control, electric power control, business machines, control of motors and solenoids, tooling machines, production and test equipment.

Title:Relays – General
Format:PDF
Size:72KB
Pages:5
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3 Comments


  1. Tài Nguyễn Hữu
    Jul 13, 2019

    This website helps me gain more knowledge about industrial electricity, electronics, and electrical – electronic engineering, …


  2. Tài Nguyễn Hữu
    Jul 13, 2019

    I like this web very much.


  3. baburaman
    Sep 08, 2012

    Could you please update the Relay protection curves types and its specific function and selection for specific application

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